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Method and device for communication between ECP system display terminal and head end control unit

A display terminal and control unit technology, applied in transmission systems, transportation and packaging, digital transmission systems, etc., can solve problems such as channel occupation, communication conflicts, and impact on communication quality

Active Publication Date: 2014-12-03
QINGDAO SRI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] After studying the above-mentioned prior art, the inventor found that if the current ECP system display terminal and the head-end control unit want to send data messages at the same time, the ECP system display terminal and the head-end control unit will seize the channel, and communication will occur. Conflicts, affecting communication quality

Method used

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  • Method and device for communication between ECP system display terminal and head end control unit
  • Method and device for communication between ECP system display terminal and head end control unit
  • Method and device for communication between ECP system display terminal and head end control unit

Examples

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Embodiment 1

[0106] see figure 1 , which shows a flow chart of a communication method based on the ECP system display terminal and the head-end control unit provided by the present invention. In the present invention, the ECP system display terminal is preset as a communication high priority, and the head-end control unit Low priority for communication. Therefore, in the present invention, when the ECP system display terminal and the head-end control unit send data messages at the same time, the data message sent by the ECP system display terminal is sent first, and after the data message sent by the ECP system display terminal is completed, the head-end control unit is sent Data message sent. Specific methods include:

[0107] Step 101, when the ECP system indicates that the terminal intends to send the first data message and at the same time the head-end control unit intends to send the second data message, respectively judge the communication priorities of the sender of the first data...

Embodiment 2

[0114] Based on the above examples, please refer to figure 2 , which shows another flow chart of a communication method between a display terminal and a head-end control unit based on an ECP system provided by the present invention.

[0115] In the above embodiments, the present invention collectively refers to all types of data messages sent by the ECP system display terminal as the first data message. In this embodiment, the present invention further divides the priority of multiple types of data messages included in the first data message. Preferably, it is defined that the first data message includes a first high-priority data message and a first low-priority data message.

[0116] Methods include:

[0117] Step 201, when the ECP system indicates that the terminal intends to send the first data message and at the same time the head-end control unit intends to send the second data message, respectively judge the communication priorities of the sender of the first data me...

Embodiment 3

[0133] Based on the above examples, please refer to image 3 , which shows another flowchart of a communication method between a display terminal and a head-end control unit based on an ECP system provided by the present invention, including:

[0134] Step 301, when the ECP system indicates that the terminal intends to send the first data message and at the same time the head-end control unit intends to send the second data message, respectively judge the communication priorities of the sender of the first data message and the sender of the second data message.

[0135] Step 302, when it is judged that the sender of the first data message is of high priority for communication and the sender of the second data message is of low priority of communication, further judge whether there are other data messages with the same priority as the first high priority data message. If the data message to be sent exists, go to step 303; if not, go to step 304.

[0136] Step 303: Put the firs...

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Abstract

The invention provides a method and device for communication between an ECP system display terminal and a head end control unit. The ECP system display terminal is preset as a high communication priority, and the head end control unit is preset as a low communication priority. The method includes the steps that when the ECP system display terminal is ready to send a first data message and meanwhile the head end control unit is ready to send a second data message, the communication priority of a sending end of the first data message and the communication priority of a sending end of the second data message are respectively judged; when it is determined that the sending end of the first data message is a high communication priority and the sending end of the second data message is a low communication priority, the first data message is sent preferentially; after the first data message is sent, the second data message is sent. Thus, the sending sequence of the first data message sent by the ECP system display terminal and the second data message sent by the head end control unit is set, the situation that a channel is preempted by the ECP system display terminal or the head end control unit is avoided, communication conflict is avoided, and communication quality is improved.

Description

technical field [0001] The invention relates to the technical field of brake control in rail transit, and more specifically, to a communication method and device based on an ECP system display terminal and a head-end control unit. Background technique [0002] With the increase of train formation length, load and speed, the maneuvering of heavy-haul trains is faced with severe braking problems. The traditional train braking system relies on compressed air to transmit braking commands. Due to the low braking wave velocity and poor synchronization of the braking of each vehicle, the longitudinal impulse of the train is too large, which affects the safety and operating efficiency of the train. Based on this, in the prior art, the control of the train is realized by adopting the ECP (Electronically Controlled Pneumatic, wired electronically controlled air brake) system technology. [0003] ECP is a straight-through brake control technology controlled by a computer network. Its...

Claims

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Application Information

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IPC IPC(8): H04L12/865B61L15/00H04L47/6275
Inventor 方长征杨宜萍唐亮晏义武小平石亿
Owner QINGDAO SRI TECH CO LTD
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